Film advance mechanism for still cameras

US4104664A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Alfred Winkler · Munich, DE
• Peter Lermann · Feldkirchen-Westerham, DE
• Dieter Engelsmann · Unterhaching, DE
• Gunter Fauth · Unterhaching, DE

Key dates

• Filing date: Jan 28, 1977
• Grant date: Aug 1, 1978
• Expiry date: Jan 28, 1997

Classification

• Technology area (CPC G): Physics
• CPC primary: G03B19/04
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A still camera has a housing adapted to hold a roll of film having a succession of frames. An openable shutter is provided on the housing alignable with the film and a takeup wheel in the housing is connectable to the roll of film and rotatable to wind the film up and displace the frames one-by-one past the shutter. A film-advance slide is displaceable on the housing between a pulled-out position projecting from the housing and a pushed-in position fitting snugly with the housing. A transmission and a one-way coupling are provided in the housing between the slide and the take-up wheel so that the take-up wheel is rotated to wind up the film only on displacement of the slide from the pushed-in position to the pulled-out position. Furthermore, a frame-sensing mechanism in the camera arrests displacement of the slide or a portion of the slide in the direction toward the pulled-out position when a fresh frame is properly aligned with the shutter.